it finally deletes any process whose status was @samp{Exited} or
@samp{Signaled}. It returns @code{nil}.
+The processes are shown in a buffer named @samp{*Process List*}, whose
+major mode is named Process Menu mode.
+
If @var{query-only} is non-@code{nil} then it lists only processes
whose query flag is non-@code{nil}. @xref{Query Before Exit}.
@end deffn